Newton's Second Law (F = ma) Calculator
Fill in the values and the answer updates as you type.
How the Newton's Second Law (F = ma) Calculator works
F = m × a. With constant acceleration from rest, speed v = a × t and distance s = ½ a t². Using 9.8 m/s² gives the weight force of the mass at Earth's surface. Example: with the default values, force (n) comes to 98.
Inputs and results
The Newton's Second Law (F = ma) Calculator takes 3 inputs and gives 4 results.
What you enter
- Mass (kg) — starts at 10.
- Acceleration (m/s²) — starts at 9.8.
- Time from rest (s) — starts at 3.
What you get
- Force (N)
- Force (lbf)
- Speed after time (m/s)
- Distance covered (m)
Example: Newton's Second Law (F = ma) Calculator with the starting values
With mass 10 kg, acceleration 9.8 m/s² and time from rest 3 s, the calculator returns:
| Force (N) | 98 |
|---|---|
| Force (lbf) | 22.03 |
| Speed after time (m/s) | 29.4 |
| Distance covered (m) | 44.1 |
Change any value above and the results update straight away.
Newton's Second Law (F = ma) Calculator FAQ
How do I use the Newton's Second Law (F = ma) Calculator?
Enter mass, acceleration and time from rest in the fields, then read force (n), force (lbf), speed after time (m/s) and distance covered (m) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Newton's Second Law (F = ma) Calculator calculate?
Force from mass and acceleration, with speed and distance after a time. It returns force (n), force (lbf), speed after time (m/s) and distance covered (m) from the 3 values you provide.
What values does the Newton's Second Law (F = ma) Calculator start with?
It opens with mass 10 kg, acceleration 9.8 m/s² and time from rest 3 s so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Newton's Second Law (F = ma) Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Newton's Second Law (F = ma) Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.